Air heating furnace and radiator therefor



Sept. 10, 1957 s. c. SALTER 2,805,659

AIR HEATING FURNACE AND RADIATOR THEREFOR Filed March 5, 1954 2Sheets-Sheet 1 INVENTOR. SA/r/e C. 5a/fel' 147'7ORNEX Sept. 10, 1957 s.c. sALjrER 2,805,659

AIR HEATING FURNACE AND RADIATOR THEREFOR Filed March 5, 1954 2Sheets-Sheet 2 INVENTORL: s/ r/p c. awv

United States Patent AIR HEATING FURNACE AND RADIATOR THEREFOR ShirleyC. Salter, Kalamazoo, Mich., assignor to Kalamazoo Furnace & ApplianceManufacturing Company, Kalamazoo, Mich.

Application'March 5, 1954, Serial No. 414,399 2 Claims. (Cl. 126-102)This invention relates to an air heating furnace and radiator therefor.The invention relates particularly to an air heating furnace commonlydesignated as a hot air furnace and heating exchange radiator.

The main objects of this invention are:

First, to provide a hot air furnace adapted for use with either gas orliquid fuel and one which is highly efiicient in proportion to its sizeand the amount of fuel consumed.

Sec ond, to provide an air heating furnace which may be quickly adaptedt o the burning of liquid fuel or gas.

Third, to provide in an air heating apparatus an improved radiator orheat exchange unit which is highly efficient and at the same time doesnot objectionably impedethe flow. of. gases therethrough. Y

Objects relating to details and economies of the invention will appearfrom the description to follow. The invention is defined and pointed outin the claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawing, in which:

Fig. 1 is a front perspective view of a hot air furnace or heaterembodying my invention, parts being broken away to show structuraldetails.

Fig. 2 is a front perspective view of the combustion chamber andradiator removed from the casing.

Fig. 3 is a fragmentary horizontal section on a line corresponding toline 3-3 of Fig. 4 with a fragment of the casing being illustrated toshow the relation of the discharge flue thereto.

Fig. 4 is a fragmentary vertical section on a line corresponding to line4-4 of Fig. 3.

Fig. 5 is a fragmentary view in vertical section on a line correspondingto line 55 of Fig. 3.

The embodiment of my invention illustrated comprises a casing 1 ofrectangular horizontal section and having an air inlet opening 2 and anair discharge opening 3 at the top. The dome or other connection for hotair conduits or the like is not illustrated as they form no part of thisinvention. In certain installations a blower and filter is associatedwith the inlet but these are not illustrated as they form no part ofthis invention.

The combustion chamber 4 is of general cylindrical section and isdisposed in upright position. The combustion chamber is provided with acombustion unit such as the burner indicated conventionally at 5 whichmay be either a gas or liquid fuel burner. Where liquid fuel is used asuitable fuel feed means is provided, as indicated at 6.

The combustion chamber is provided with a door frame 7 having a closureplate 8 removably secured thereto to facilitate the installation of thecombustion unit. However, the details of this form no part of my presentinvention and therefore are not further described.

The radiator or heat exchange unit designated generally by the numeral 9is of polygonal horizontal section, desirably octagonal as illustrated.This radiator is formed of a plurality of angularly disposedcomplementary sections 10 having flat uniformly spaced or parallel sidewalls. The radiator is relatively narrow as compared to its height.which desirably is approximately onehalf the height of the combustionchamber.

The radiator is disposed in radially spaced relation to the combustionchamber and also to the casing .so that air passing upwardly through thecasing may circulate around the radiator.

The upper end, of the combustion chamber is connected to one of theradiator sections by a conduit 11 opening centrally thereto. This, inthe embodiment illustrated, is the rear section.

The diametrically opposed front section of the front section of theradiator has a discharge flue member 12 connected thereto .and extendingthrough the casing 1 as is clearly shown in Figs. 3 and 4.

A clean-out opening 13 is provided in the outer wall of the radiatorsection to which the discharge 12 is connected. This opening is normallyclosed by the removable closure plate 14. This enables the cleaning ofthe radiator from the front of the heater which is desirable as theseheaters are designed to permit their being installed, if necessary to doso, in confined spaces such as are frequently found in modern homes ofsmall size.

The casing is provided with a removable portion 15 affording access tothe'clean-out. The burner motor is installed in a chamber 11 providedtherefor in the casing, this being closed by the removable panel 17having a screen portion 18 for admitting air to the motor.

As the gases pass from-one radiator section to a successive section theangular relation thereof creates a turbulence in the gases owing totheir impinging discharge against the outer walls of the section as thegases enter the succeeding section. This turbulence causes the gases toimpinge or contact both the inner and outer walls during their passagethrough their section.

As is illustrated, I preferably provide certain of the sections withvertically disposed bafiies 19 and 20, the baffle 19 being mounted onthe inner wall of one section and the baffle 20 on the outer wall of thesucceeding section. The inner edges 21 of these baflles are spaced fromthe Wall opposite to the wall to which they are attached so that thegases may flow past the same but in doing so are directed into impingingrelation to the walls opposite the bafiles. This further increases theefficiency of the unit which is however relatively efiicient owing tothe angular relation of the sections and the large wall area resultingfrom the shape of the radiator.

I have mentioned that the heater is well adapted for use with liquidfuel and with gas. When used with the gas burner it is desirable toprovide the baffle 23 for the discharge flue member 12. This bafiie isof segmental shape and is detachably mounted on the bracket 24projecting upwardly from the bottom of the flue member 12., the bafflebeing secured by the bolt 25.

A closure ring 26 is provided for the joint between the casing wall andthe flue member 12. This is provided with ears 27 which receive theclamping screw 28.

The combustion chamber is provided with supporting feet 29 and 313. Theradiator is mounted on the combustion chamber by brackets 31 and theconnecting flue 11.

I have illustrated and described my invention in a highly practicalembodiment thereof. I have not attempted to illustrate or describevarious modifications and adaptations to meet different conditions suchas installing as it is believed that this disclosure will enable thoseskilled in the art to embody or adapt my invention as may be desired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a structure of the class described, the combination with a hot aircasing having an air inlet and an air outlet, of an upright combustionchamber disposed within said casing and provided with a combustion unit,a radiator surrounding and radially spaced from said combustion chamberand spaced from said casing to permit circulation of air around theradiator, said radiator being of polygonal horizontal section and of aheight approximately one half the height of the combustion chamber andcomprising a plurality of complementary sections disposed in angularrelation to each other and having fiat uniformly spaced inner and outerwalls, the flat inner and outer walls of adjacent sections being joinedto each other whereby the combustion gases passing from the sectionsimpinge directly onto the outer walls ofsucceeding sections, saidcombustion chamber having a discharge connection opening centrally toone of said radiator sections through the inner wall of said section, anoutlet flue member connected centrally to the diametrically oppositesection of the radiator through the outer wall of said section andextending through the casing, the radial dimension of the sectionsbeingrelatively small as compared to their vertical dimension, verticallydisposed baffles disposed centrally in certain of the adjacent sections,the bafile of one such section projecting from the inner wall thereofand the bafile of the adjacent section projecting from the outer wallthereof with the vertical edges of the bafiies spaced from the oppositewalls.

2. In a structure of the class described, the combination with a hot aircasing having an air inlet and an air outlet therein, of a radiator ofpolygonal horizontal section comprising at least six complementarysections disposed in angular relation to each other and having spacedinner and outer walls, the outer walls of adjacent sections being joinedto each other, said radiator having inlet and outlet openings forcombustiongases, the radial dimension of the sections being relativelysmall as compared to their vertical dimension, and vertically disposedbafiles disposed centrally in certain of the adjacent sections, thebaille of one such section projecting from the inner wall thereof andthe baffie of the adjacent section projecting from the outer wallthereof with the vertical edges of the bafiles spaced from the oppositewalls.

References Cited in the file of this patent UNITED STATES PATENTS 85,335Siddons Dec. 29, 1868 139,812 Porter et a1 June 10, 1873 350,337 BacheOct. 5, 1886 371,108 Trecy Oct, 4, 1887 613,216 Schwab Oct. 25, 18981,576,020 Ahl Mar. 9, 1926 1,721,620 Firestone July 23, 1929 1,768,684Greenberg July 1, 1930 1,941,496 Schleh Jan. 2, 1934 1,944,497 CrickJan. 23, 1934 2,016,739 Bouton Oct. 8, 1935 2,172,399 Mueller Sept. 12,1939 2,357,523 Kimberley Sept. 5, 1944 2,543,201 Rifley Feb. 27, 19512,683,024 Butler et al July 6, 1954 FOREIGN PATENTS 389,459 France June29, 1908 766,665 France Apr. 16, 1934

